Speaking at the G20 summit in Rio de Janeiro, Brazil, Keir Starmer refused to say whether Ukraine would be granted permission to fire Storm Shadow missiles into Russian territory

President Joe Biden's apparent green light for Ukraine to strike Russia with US-made long-range missiles has caused consternation among Donald Trump's allies. Trump himself has not commented, but he won the election after promising to end the war - and people close to him have condemned the move as dangerous escalation.

A Russian lawmaker calls President Biden's decision to let Ukraine fire U.S. missiles deep into Russia a "very big step toward the beginning" of a third world war.

The Kremlin said on Monday that Russia would respond to what it called a reckless decision by Joe Biden's administration to allow Ukraine to fire American missiles deep into Russia, which it said would draw the United States directly into the conflict.

After U.S. President Joe Biden gave the go-ahead for Ukraine to wield long-range American missiles deep inside Russia, as a Newsweek map illustrates, questions remain over just how much of a difference this will make as Moscow gains in the east and a new U.